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Which number is closest to $\sqrt{61}$ ? $\newline$ Choices: $\newline$ (A) $7.8$ $\newline$ (B) $6.8$ $\newline$ (C) $8.1$ $\newline$ (D) $6.6$

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Estimate positive square roots

Full solution

Q. Which number is closest to

\sqrt{61}

?

\newline

Choices:

\newline

(A)

7.8

\newline

(B)

6.8

\newline

(C)

8.1

\newline

(D)

6.6

Calculate square root: Calculate the square root of $61$ using a calculator. $\sqrt{61} \approx 7.81$ .
Compare with choices: Compare the calculated square root with the given choices. $\newline$ Choices are: $(A) 7.8, (B) 6.8, (C) 8.1, (D) 6.6.$ $\newline$ $7.81$ is closest to $7.8$ .

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